a[3000];f(int*a,int*b){return*a-*b;}main(n,v,p,b,i){for(;~scanf("%d%d",&n,&p);puts(b?"Not jolly":"Jolly")){for(i=--n;i;scanf("%d",&v),a[--i]=abs(p-v),p=v);for(qsort(a,n,4,f),b=i=0;i<n;b|=++i!=a[i-1]);}}
